Sanyo Denki PE Series Installation And Operation Manual page 97

With no Brake
Delay
PE Manual
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As noted in the section above, the standard amplifier configuration has a 300mS delay
between the release of the brake and motor excitation. During this time, the command is
internally clamped to 0, but position commands are still being counted. In the case where
the load may force the motor to move during this short time, the motor will jump on
motor excitation. The amplifier will attempt to move the motor back to the position it
was in when the Holding Brake Excitation output (HBON) was turned OFF. This
condition is common with vertical loads.
To eliminate this "jump," the holding brake delay can be set to 0 by changing Func2 bit 6
to "0" (Remote Operator Mode 0, Page 12). In this case, the motor excitation will occur
before the brake is actually released. The drawback to this configuration is increased
wear and strain on the holding brake. The timing diagram below defines the sequence of
operation.
‹ Start Ready Complete
Output (SRDY)
‹ Servo ON (SON)
On
‹ Motor Excitation
On
Copyright © 2000 Automation Intelligence, Inc.
12 msec
97
On
Off
12 msec
Issued: 27-Apr-00